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Split PTD-09 into candidate selection and joint solving - #99

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Split PTD-09 into candidate selection and joint solving#99
omry wants to merge 1 commit into
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pr99

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@omry omry commented Aug 19, 2026

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The original PTD-09 carried both per-requirement candidate selection and
across-requirement joint constraint solving, and permitted itself to be split
before coding if it could not be reviewed coherently as one unit. It cannot.

Candidate selection is per requirement and is largely carried by the parked
extraction source, which contains roughly 224 lines of single-request
resolution. Joint solving is across requirements and has no parked basis at
all: the parked resolver contains no occurrence of scope, partition,
assignment, or backtracking. The two also fail differently. Selection removes a
candidate that cannot satisfy one request; solving chooses among surviving
candidates so that separate requirements do not conflict in a shared provider
domain.

Reviewing both as one pull request would have produced a slice larger than
PTD-04, which is the largest this campaign has reviewed and took eight rounds
and thirteen findings.

PTD-09 now owns normalization, enumeration, per-request reduction, and
ordering, and its acceptance covers only those. PTD-09B owns the bounded
deterministic constraint problem, domain partitioning, backtracking, the
assignment cap, and the pre-acquisition recheck, and carries the acceptance
criteria that describe them. PTD-10 depends on PTD-09B, so the delivery order
is unchanged.

The task IDs and authority are updated here, before either slice is
implemented, which is the order the split rule requires.


@omry
omry changed the base branch from main to pr97 August 19, 2026 04:46
@omry
omry marked this pull request as ready for review August 19, 2026 04:54
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omry commented Aug 19, 2026

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The original PTD-09 carried both per-requirement candidate selection and
across-requirement joint constraint solving, and permitted itself to be split
before coding if it could not be reviewed coherently as one unit. It cannot.

Candidate selection is per requirement and is largely carried by the parked
extraction source, which contains roughly 224 lines of single-request
resolution. Joint solving is across requirements and has no parked basis at
all: the parked resolver contains no occurrence of scope, partition,
assignment, or backtracking. The two also fail differently. Selection removes a
candidate that cannot satisfy one request; solving chooses among surviving
candidates so that separate requirements do not conflict in a shared provider
domain.

Reviewing both as one pull request would have produced a slice larger than
PTD-04, which is the largest this campaign has reviewed and took eight rounds
and thirteen findings.

PTD-09 now owns normalization, enumeration, per-request reduction, and
ordering, and its acceptance covers only those. PTD-09B owns the bounded
deterministic constraint problem, domain partitioning, backtracking, the
assignment cap, and the pre-acquisition recheck, and carries the acceptance
criteria that describe them. PTD-10 depends on PTD-09B, so the delivery order
is unchanged.

The task IDs and authority are updated here, before either slice is
implemented, which is the order the split rule requires.
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